Lock for railway vehicle and like doors



March 10, 1925- G. w. HALL LOCK FOR RAILWAY VEHICLE AND LIKE DOORS File@ July 7, 1924 Mardi 1o, 192s- G. W. HALL LOGI( POR RAILWAY VEHICLE AND LIKE DOORS F119@ .my v, 1924 2 sheets-sheet 1. E M j NN, $1 NN.

Patented Mar. 10, 1925...

UNITED STATES GEORGE WILLIAM HALL, OF BLACKPOOL, ENGLAND.

LOCK FOR RAILVJAY VEHICLE AND LIKE DOORS.

Application filed July 7,'1924. Serial No. 724,716.

doors, of the kind in wlnch'xthe latch is :actuated from a distancegfor'example pneumatically or electrically. The object of the ilnnentionfis/ o provide a device in which the bolt can be manually withdrawn independently of the main locking or unlocking mechanism.

One construction of lock in accordance with this invention is illustrated by way of example in the accompanying dra-wings,v in

- which- ,lock being in their locked position.

Figures el. and 5 are perspective views respectively of the unlocking lever and the' key for operating it.

In the construction illustrated, the lock comprises a casing having an end plate A through which the bolt head B of a bolt B projects, the bolt and bolt head being formed separately and screwed together for the purpose hereinafter described. The bolt carries a fixed washer C adjacent to its head and a movable washer C slidable along the bolt, a light compression spring D being disposed between the two washers C and C. The inner end of the bolt B is squared as at B2 and passes through a square hole in a guide E within the casing a fixed washer C2 being provided on the bolt to limit its movement in one direction while the washer C limits its movement inthe other, direction. The bolt B is thus free to'slide longitudinally within the' casing ybut is heldy against rota'-y ton by its squared portion B2.v

Mounted en a spindle F within the easing is a lever F one arm of which is slotted as at F2 to engage the bolt B at a point between the two washers C and C, while the other arm F3 of t/he lever is formed'asr /60 hook and attached to one end of a tension spring G. The other end o-f the spring G is connected to the/ pneumatically or electrically controlle/d actuating device H, and tile/movement of the lever F under the ac- "tion of this spring is limited by a stop pin J mounted in bosses J secured to the sides of the lock casing. Thus, when the arm F3 of the lever F is pulled down bythe spring G, the arm F2 of the lever acts on the mov- 70 able washer C and through the spring D to operate the bolt B. rlhe spring G is of such strength that it will not be extended to any appreciable extent before the bolt B is moved, this spring serving to prevent ex- T4 cessive stress being placed on the arm F3 of the lever F due to further movement of the pneumatically or electrically controlled actuating device H after the arm F 3 has engaged the stop pin J. j

Secured to the inner end B2 of the bolt B is a ring bolt K to which is attached one end of a chainl L which, after passing over a guide pulley M mounted to rotate on a spindle M engages at its other end with the free end of a lever N. The lever N is secured to a spindle N mounted to rotate in the casing, one endl N2 of the spindle extending through the casing and being provided with a projection N3, lugs N4 and grooves N5 which are adapted to be Vengaged by a suitably shaped key O as shown in Figures 4 and 5. The spindles M and N are supported by reinforcing bosses l and P on the sides of the casing, which carries also a pin Q, to which one end of a spring R is connected, the other end of this springbeing connected to a hook R on the lever y The end plates of the lcasing may be bevelled so that when the lock is fitted to the door post of a'. railway carriage the lock will be slightly inclined. This causes the' lock to lie in a direct line with the pneumatically or electrically controlled actuating de 105 vice in spite of the curve of the carriage door post, so that the spring G does not exert a sideways pull on the lever F. l,The endN2 of the spindleN extends thron hi the casing and beyond the' outer edge of4 he door post 11o where the' projection N3 is conveniently prod rented by a guardi L lever F about its Y' The striker plate for the lock would conveniently be provided with an inclined slide in the known mamier and the end of the bolt head B is conveniently bevelled at B3 as is usual when such an inclined slide is employed.

The operation of the lock is as follows VVhen the pneumatically or electrically controlled actuating device is inoperative.,

ythe spring R maintains the lever 'F lin the position shown in Figure l so that the bolt E is withdrawn. When the main actuating z isoperated to lock the door however` the l on the spring Gr rocks the 1F against the action of the spring R and, 1 the washer C and spring D, moves the bo D i to its locked positionas shown in Figure 3. l Li in its locked position the bolt B caribe withdrawn in dependent-lyvv of the pneumatically or electrically controlled actuating devic-eVH by rotating the spindle N Aby means ofthe key O, such rotation moving the lever N soas to exert a pull on the chain L and thuswithdraw `the bolt B. The force necessary to- Withdraw the bolt B in this Inanner has only to be suiiicient to compress the light spring D. Similarly if anydoor is slammed after the pneumatically or electrically controlled actuating device has been operated to lock such door, the bolt B will be forced `in by the inclined slide on the striker plate against the action of the spring D and` will be subsequently forced out into the hole in thel door on the door being fully closed.

The lock is placed in the cavity between the outside wall and the wainscot of the carriage allowing the bolt of the lock to be worked. through a hole in the door post and at the same time allowing the lock to be clear of any of the different types ot locks vusually employed.

The lock illustrated when fully assembled may be too long to be placed in the space allowed so that the bolt'is made in two porand the bolt, a relatively strong spring be# tween the other arm of the lever and the main actuating member, means forV limiting the movement of the lever under the action t the stronger spring, a second bolt-actuating means forl anually operating said second bolt from outside' asingfindependently of the main actuating lever.

2. In a lock for vehicle doors the com slide therein, an actuating lever for the bolt, a main actuating member disposed outside the casing, means for controlling said main actuating member 'from a distance, a weak spring between one arm of ythe actuating lever and the bolt, a relatively stronger spring connecting the other arm oit the lever to the main actuating member, means for limiting' the movement lofthe lever under the action of the stronger spring, a second bolt actuating lever mounted within the casing, a flexible and inextensible connection between the bolt and said second actuating lever and a removablekey eci-,operating with said second actuating leverv to withdraw the bolt from outside the casing independently `ot' themain actuating lever.

In testimony whereof I have signed my name yto this specification.

GEORGE WILLIAM HALL.

has,... n 1 4"" V` tion of a casing, a locking `bolt mounted to r mounted within the casing, and. 

